Saudi Arabia and Israel have admitted they have been holding secret talks to impede Iran’s progress and influence across the region.

While a secret alliance has long been suspected, representatives from the two nations confirmed that Israel and Saudi Arabia had held a series of talks about how to thwart Iran’s influence in the Middle East, Sputnik reported.

Speaking at the Council on Foreign Relations in Washington Thursday, the retired Saudi general, Anwar Majed Eshki, used particularly alarmist language to describe Tehran. He described the Islamic Republic as an aggressive nation. He stood alongside Dore Gold, soon to be the next director general of Israel’s Foreign Ministry.

“Our standing today on this stage does not mean we have resolved all the differences that our countries have shared over the years. But our hope is we will be able to address them fully in the years ahead,” Gold said.

The presentation was the summation of five top secret meetings held between Tel Aviv and Riyadh beginning in 2014.

“We discovered we have the same problems and same challenges and some of the same answers,” Shimon Shapira, a retired Israeli general, told Bloomberg View. He went on to say that the two countries had considered political and economic strategies for how best to hinder Iran’s regional activities.

While suspicions of the Saudi-Israeli relationship have lingered, concrete evidence was first presented through diplomatic cables released by WikiLeaks in 2010. Yacov Hadas, a former deputy director general of Israel’s Foreign Ministry, explained the reasoning for warming relations between his country and the Persian Gulf Arab states.

“[Persian] Gulf Arabs believe in Israel’s role because of their perception of Israel’s close relationship with the U.S. but also due to their sense that they can count on Israel against Iran,” the cable read.

As for the recent spike in covert cooperation, that can likely be traced to the Iran nuclear talks with the U.S. and other countries in 5+1 group, and Saudi’s unproven allegations that Tehran is arming Houthi rebels in Yemen. Both Israel and Saudi Arabia have been two of the most vocal opponents to the lifting of Iranian nuclear sanctions, and Saudi Arabia has depended on heavy assistance from the United States for its bombing campaign against the Houthis.

The final deadline for a formalized agreement on the nuclear deal is fast approaching, expiring on June 30. If everything goes according to plan – the gradual permission for Tehran to develop nuclear energy for peaceful purposes – fear could drive Israel and Saudi Arabia even closer.